Why is it when songs are released there said to be new. You can listen to the music on their CD. Like Nickelback's new song "If Everyone Cared", that was already on their CD and they say its new, how can that be? Also why do radio stations only play certain songs from certain groups. Like Green Day or Nickelback, you only some of the songs on the radio why is that??? I know that radio stations only play certain types of music but why is the song choice limited. Why don't they choose other songs to be played on a group's CD???